Carbon dioxide |
NO.2LL |
| CO2 |  |
 |
Performance
| Measuring Range | 300 to 5000 ppm |
| Number of Pump Strokes | 300 to 5000 ppm (n=1) |
| Correction Factor | 1 |
| Sampling Time | 2 minutes per pump stroke |
| Detecting Limit | 30 ppm (n=1) |
| Colour Change | Pale blue → Purple |
| Reaction Principle | CO2 + N2H4 → NH2 NHCOOH |
| Coefficient of Variation | 10% (for 300 to 1000 ppm), 5% (for 1000 to 5000 ppm) |
| Shelf Life | 3 Years |
| Corrections for temperature & humidity | Unnecessary |
| Store the tubes at cool and dark place. | |
Possible coexisting substances and their interferences (NOTE)
| Substance | Concentration | Interference | Change colour by itself to |
| Ammonia | No | No | |
| Carbon Monoxide | No | No | |
| Chlorine | No | No | |
| Hydrogen chloride | No | No | |
| Nitrogen oxides | No | No | |
| sulphur dioxide | No | No | |
| Amines | No | No | |
| Organic solvents | No | No |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-STEL | Explosive range |
| 5000 ppm | 30000 ppm | - |
